Have you actually tried sufficiently large traps in sufficient quantity to make an audible difference? I see guys using hopelessly small bits of foam or similar that at beat could only trap dust.@lemonhaze Certainly! Bass traps saved the day in our room at one of the last T.H.E. Shows in Las Vegas.
But a DBA simply does it better, that's all. You do the DBA first, **then** the bass traps (if needed), since the DBA is far more effective at sorting out bass problems.